Die for forming metallic plates.



L. L. SAGENDORPH. DIE FOR FORMING METALLIC PLATES.

(Application filed June 8, 1900.)

Patented May 7, mm.

No. 673,848. Patented May 7, I901.

L. L. SAGEND ORPH. DIE FOR FORMING METALLIB PLATES.

(Application filed June 8, 1900.)

v (No Model.) 2 Sheets-Sheet 2.

.Yu: NORRIS PETERS w. mm'oumm WA HINGYON 0, 0,

5 et-8 M rrnp S tries.

LONGLEY LEVIS SAGENDORPH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OFONE-HALF TO I-IARLAN P. LLOYD, OF CINCINNATI,

OHIO.

DIE FOR FORMING METALLIC PLATES.

SPECIFICATION forming part of Letters Patent No. 673,848, dated May '7,

Application filed June 8, 1900.

To all] whom it may concern.-

Be it known that I, LONGLEY Lnwrs SAGEN- DORPH, a citizen of the UnitedStates, residing in Philadelphia, Pennsylvania, have invented certainImprovements in Dies for Forming Metallic Plates, of which the followingis a specification.

The object of my invention is to reduce the cost of manufacture of diesfor striking up sheet-metal plates and other objects. This object Iattain in the following manner, reference being had to the accompanyingdrawings, in Which- Figure 1 is a side-view of the upper and lower dieswith the plunger and bed-plate in section. Fig. 2 is an inverted planview of the upper die. Fig. 3 is a sectional view of the upper and lowerdies, and Figs. 4, 5, and 6 are perspective views showing the parts ofthe upper die detached.

My invention is especially applicable to dies for striking upsheet-metal plates. For this work the dies require to be renewed atintervals and a large number of dies are essential owing to thedifferent patterns required. It will be understood, however, that theinvention can be used for stamping any material and for any purposewithout departing from my invention.

Heretofore in the manufacture of dies for striking up metallic platesthe dies were made entirely of metal, and in patents granted to me, Nos.616,976, dated January 3, 1899, and 639,096, dated December 12, 1899, Ihave described and claimed dies and the process of making same, in whicha soft-metal die is faced with a hard-metal plate. Therefore I lay noclaim to this feature. I will now describe my present invention.

A is the lower die, and B the upper die. In the present instance thelower die is the hardmetal die out to the desired design and hardened inthe ordinary manner. The'upper die 13 has a metallic facing D, ofsheet-steel or othersuitable metal, which is pressed, preferably, bymeans of the lower die A and castmetal die. This cast-metal die is castfrom the lower die A and kept simply for the purpose of reproducing themetallic facingplate D.

E is the frame of the upper die, quadran- $erial No. 19,535. (No model.)

gular in the present instance, and having one or more cross-bars 6.These crossbars are perforated for the passage of the bolts 6, by whichthe die is secured to the plunger B, the lower die being confined to thebed A, as shown in Fig. 1.

The metallic face-plate D has a flange cl, which is secured to the frameE by rivets, screws, or other means of fastening, as shown in Fig. 3,and between the cross-bars e and the face-plate D, I preferably insert astrip of metallic lathing, bars, strips, or wire-cloth f. The frame isfilled with plastic or molten materialI, which will set or harden toform a rigid backingfor the metallic face-plate D. The material I isheld together by the lathing f, which prevents it from cracking, and thebolts 6 are also held in position by the material I. The material I,that is filled in the plate to support the face-plate of the die, may beconcrete, cement, rubber, lead, Babbitt metal, or any material which canbe poured into the frame, so as to fill in the crevices of the dieplate,or any plastic material which can be forced into the crevices and whichwill become hard and sustain the pressure to which the die is subjected.In large dies, for sheetmetal work for instance, I preferably useconcrete or cement; but in small (lies I may use a rubber composition,lead, or any metal which has a lower melting-point than the plate. ThusI provide a mass of homogeneous material to sustain the pressure againstthe metallic face'plate. This material can be readily replaced if itshould disintegrate or crack after the die has been used, and theface-plate when Worn can also be readily replaced when necessary.

In practice when it is desired to make a standard metallicceiling-plate, forinstance, I will strike up a number of the face-platesD by means of the die A and the cast-metal die and make up several diesB and keep some of the face-plates in reserve, so that should one of thedies B need refacing the old plate D can be removed, as well as thecoment or other filling material, and a new faceplate attached to theframe and fresh material poured into the frame.

It will be understood that while I have shown a quadrangular frame theframe may be round, oval, or, in fact, any shape desired,

according to the pattern and the shape of the article to be pressed.

Myinvention can also be used for both the 1. A die having a frame, ametallic faceplate secured thereto, and a backing within the frame of amaterial that will withstand I the pressure, said material being appliedto the frame and plate in a plastic or molten condition, substantiallyas described.

2. A die having a thin metallic face-plate, a frame-support for saidface-plate, and a backing of cement or other material inserted in theframe to conform to the face-plate, substantially as described.

3. A die having a metallic faceplate, a backing .therefor, and ametallic tie-plate or bars within the backing, substantially as and forthe purpose specified.

4. A die having a frame with cross-bars secured thereto, boltsprojecting from said crossbars, a metallic faceplate secured to saidframe, cement or other material forming a backing for the face-plate inwhich portions of the bolts are embedded, and a perforated sheet ofmetal within the backing, substantially as described.

5. A die having a frame, a flanged metallic face-plate secured to saidframe, and a backing for the face-plate within the frame, substantiallyas described.

6. A die having a frame, with cross-bars secured thereto,'boltsprojecting from said crossbars, a metallic face-plate secured to saidframe, and cement or other material forming a backing for the faceplateand in which portions of the bolts are embedded, substantially asdescribed.

In testimony whereof I have signed my name to this specification inthe-presence of two subscribing witnesses.

LON GLEY LEWIS SAGENDORPH.

Witnesses:

WILL. A. BARR, J 0s. H. KLEIN.

